Abstract: A system for controlling a disconnect switch via a network may include a disconnect switch and a drive. The disconnect switch may receive alternating current (AC) power from an AC power supply, and the drive may then receive the AC power via the disconnect switch. The drive may include a processor that may communicatively couple to the disconnect switch. As such, the processor may control a drive operation that corresponds to the drive and control a disconnect operation that corresponds to the disconnect switch.

Abstract: A method and apparatus for altering converter control as a function of the degree of unbalance in supply line voltages to substantially eliminate second harmonics on the supply lines caused by active control of the converter including identifying supply line peak amplitude values and using the peak values to identify potential second harmonics and then altering command values as a function of the potential second harmonic components.

Abstract: A method and apparatus for use with a power conversion configuration including a pulse width modulated (PWM) converter, a PWM inverter and master and slave carrier signal generators wherein the master and slave carrier signal generators receive master and slave PWM frequency signals and generate master and slave carrier signals as a function thereof, PWM signals for controlling the converter and the inverter derived by comparing converter and inverter modulating waveforms to converter and inverter carrier signals, respectively, the method comprising the steps of identifying a phase difference between the master and slave carrier signals, using the phase difference to modify subsequent slave carrier signals to substantially conform the slave carrier signal frequency and phase to the master carrier signal frequency and phase and using the master carrier signal and the modified slave carrier signal to generate control signals for the converter and the inverter.